.main .main_width .back {
	margin: 0 auto;
	margin-top: 5px;
	margin-bottom: 80px;
	position: relative;
	background: rgba(255, 255, 255, .5);
	padding: 40px; 
}
.main .main_width .back h1{
	font-size:18px;
	line-height:1rem;
}